Camera: Relax logical camera stream combination requirement

Depending on hardware capability, a logical camera may not support
concurrent physical streams. Relax the requirement for stream
combination accordingly.

Also fix missing MANDATORY_STREAM_COMBINATIONS issue for hidden physical
camera.

Test: Updated camera CTS, ITS
Bug: 119325664
Change-Id: Iddbef330d7e091d55ac44124a03fca5a932ae13a